Historically, it was thought that the ACL alone was the major contributor to rotational stability of the knee. This investigation revealed that an injury to the ACL alone is not enough to cause rotational instability (as measured by a pivot shift exam). Instead, an injury to the ACL and ALL (or ITB) is required to cause rotational instability (as measured by the pivot shift exam).
Historically, it was thought that the ACL alone was the major contributor to rotational stability of the knee. This investigation revealed that an injury to the ACL alone is not enough to cause rotational instability (as measured by a pivot shift exam). Instead, an injury to the ACL and ALL (or ITB) is required to cause rotational instability (as measured by the pivot shift exam).
